If you’ve ever heard of Rick Simpson Oil (RSO), you’re probably intrigued by its reputation as a miracle cure for a wide range of health conditions. Rick Simpson, who developed the oil after his own battle with cancer, created a method of making RSO that has gained worldwide recognition. So, what is RSO? Simply put, it’s a highly concentrated form of THC oil designed for medicinal use, and for many people, it’s a game-changer.Let’s start at the beginning. Rick Simpson Oil (RSO) is a cannabis concentrate that’s rich in THC and other cannabinoids. It’s different from other extracts in that it’s made using the entire plant—roots, leaves, flowers, and all.